JW, I was going to leave your scenario alone, but since it has come back up; any aeration system, if bought, is a do-it-yourself project. At least the Solear system is only component parts, not like a car that you just drive off the lot. The system looks VERY pricey, assuming they said a 120watt solar panel is about $650 to replace. That would be the heart of the system. Lets look at the remainder. 200amp hr. battery, about $200 dollars unless gel cell, then $350. Mounting box, fan, compressor, air line,timer, diffuser,, 400 watt inverter unless the compressor is DC. That's over $3000 excluding the battery and panels. $650 not bad for 120 watt of solar power, 5-6 dollars per watt. The rest seems too pricey and can be bought anywhere. Just dont want to see you get hosed. At 15 feet deep, you need a compressor that will end up being 250-300 watts, so I doubt you can run it more than 8 hrs.daily. Now if you got a second battery and charger for home, and swapped them out every couple weeks, you will be OK for 14-16 hrs daily.
Hope this makes sense. In the LB's case with only 8 ft depth, a much smaller compressor can be used. :Gast has one that will produce 1cfm at 4 psi and uses only 60 watts.